Book support device



FIG. 1 is a perspective view of a book support device showing my new design;

FIG. 2 is a side elevational view, the opposite side being a mirror image thereof;

FIG. 3 is a front elevation view;

FIG. 4 is a rear elevation view;

FIG. 5 is a top plan view; and,

FIG. 6 is a bottom plan view. 

The ornamental design for a book support device, as shown and described. 